|本期目录/Table of Contents|

[1]倪振华,段旻,谢壮宁,等.柱壳屋盖的等效静风荷载[J].建筑科学与工程学报,2006,23(01):17-22.
　NI Zhen-hua,DUAN Min,XIE Zhuang-ning.Equivalent Static Wind Loads of Cylinder Roof[J].Journal of Architecture and Civil Engineering,2006,23(01):17-22.
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《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

卷:
23卷
期数:
2006年01期
页码:
17-22
栏目:
出版日期:
2006-03-20

文章信息/Info

Title:
Equivalent Static Wind Loads of Cylinder Roof
作者:
倪振华;段旻;谢壮宁;
汕头大学 土木工程系,广东 汕头 515063
Author(s):
NI Zhen-hua, DUAN Min, XIE Zhuang-ning
Department of Civil Engineering, Shantou University, Shantou 515063, Guangdong, China
关键词:
等效静风荷载;  柱壳屋盖;  完全二次型组合法;  平方总和开方法
Keywords:
equivalent static wind load;  cylinder roof;  complete quadratic combination method;  square root sum of square method
分类号:
TU312.1
DOI:
-
文献标志码:
A
摘要:
根据弹性恢复力的模态展开式和计算响应的拟静力公式导出产生屋盖结构最大峰值响应的等效静风荷载。给出两种计算等效静风荷载的途径,一种表示为模态等效静风荷载的加权组合,另一种表示为背景分量与共振分量的加权组合。利用同步多点压力扫描技术对一个柱壳屋盖结构进行了风洞试验。采用完全二次型组合法(CQC法)和平方总和开方法(SRSS法)计算了不同风向角下竖向位移的峰值响应,说明了模态耦合的影响。将两种途径计算的柱壳屋盖等效静风荷载分布与平均风荷载分布作了比较,分析了相应的峰值响应与平均响应。分析结果表明:许多结点的等效静风荷载远大于平均风荷载,而且脉动风效应和共振效应也应引起重视。
Abstract:
The equivalent static wind loads(ESWL)producing maximum peak responses of roof-structures were formulated based on the modal expansion of the resilience and the quasi-static equation for calculating responses. Two approaches to compute ESWL were presented, where one approach was expressed as a weighted combination of the modal equivalent static wind loads, and the other was expressed as a weighted combination of the background component and resonant component. Wind tunnel experiments of a cylinder roof were conducted by means of the synchronous multi-pressure scanning technique. The peak responses of the vertical displacement at different wind azimuths were calculated with the complete quadratic combination(CQC)method and the square root sum of square(SRSS)method, and the effects of modal coupling were checked. The distributions of the equivalent static wind loads on the cylinder roof obtained from two approaches above were compared with the mean wind loads, and the corresponding peak responses and mean responses were analyzed. The analysis results indicate that the equivalent static wind loads acting on many nodes are much greater than the mean wind loads, and the effects of fluctuating wind and resonance are deserving of attention.

参考文献/References:

[1] XIE J,IRWIN P A,KILPATRICK J,et al.Determination of Wind Loads on Large Roofs and Equivalent Gust Factors[C]//Wind and Structures Editorial Committee.International Symposium on Wind and Structures for the 21st Century.Korea:Cheju Publishing Company,2000:417-424.
[2]HOLMES J D.Optimised Peak Load Distribution[J].Journal of Wind Engineering and Industrial Aerodynamics,1992,41(1):267-276.
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[4]GINGER J D,REARDON G F,WHITBREAD B J.Wind Load Effects and Equivalent Pressures on Low-Rise House Roofs[J].Engineering Structures,2000,22(6):638-646.
[5]ZHOU Y,KAREEM A,GU M.Equivalent Static Buffeting Loads Effects on Structures[J].Journal of Structure Engineering,2000,126(8):989-992.
[6]CHEN X,KAREEM A.Equivalent Static Wind Loads for Buffeting Response of Bridges[J].Journal of Structure Engineering,2001,127(12):1 467-1 475.
[7]KASPERSKI M,NIEMANN H J.The LRC(Load-Response-Correlation)Method-a General Method of Estimating Unfavourable Wind Load Distributions for Linear and Non-linear Structural Behaviour[J].Journal of Wind Engineering and Industrial Aerodynamics,1992,41(1):1 753-1 763.

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备注/Memo

备注/Memo:
收稿日期:2005-12-16
基金项目:国家自然科学基金项目(50378052)
作者简介:倪振华(1945-),男,浙江上虞人,教授,博士生导师,工学硕士,E-mail:zhni@stu.edu.cn。
更新日期/Last Update: 2006-03-20